<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    {% block mytitle %}
    <title>Index</title>
    {% endblock %}
</head>
<body>
    <a href="/music_index">Music</a>
    <a href="/sport_index">Sport</a>

    <br>

    {% block info %}
    This is Index
    {% endblock %}

    <br>

    <h3>Have Problems connect xxxx</h3>
</body>
</html>